This weekend's grand prix at Spa will be Schumacher's 300th race. How did reigning double world champion, fellow German, and crazy driver Sebastian Vettel commemorate the occasion? By riffing on Jalopnik, of course.

Double Formula One World Champion Sebastian Vettel stopped by Letterman last night, flying coach down from the Montreal Grand Prix. Vettel was significantly funnier than the old clown, talking about big balls and dropping a very censored f-bomb on the air.

In theory, everyone in Montreal for the Canadian Grand Prix should be focusing on the big race in just a few hours. In reality, the many German (and occasional Portuguese) team members in town for the race are actually watching the European Championship. This includes F1 World Champion Sebastian Vettel.